Table 1.

Demographic data and laboratory findings of the seronegative rheumatoid arthritis (SNRA) cases and healthy controls.

	SNRA cases	Healthy controls	P-value
Number of cases	45	45
Male/Female	36/9	36/9
Age (years)	53.0 (46.0–60.5)	52 (43.0–59.0)	0.42

14-3-3 eta protein (ng/mL) 1.00 (0.48–1.28) 0.02 (0.02–0.27) <0.001 Anti-CarP (ng/mL) 1.23 (0.88–1.79) 1.47 (0.87–2.22) 0.27 Anti-Sa (ng/mL) 9.29 (6.12–13.69) 8.86 (6.63–14.7) 0.47